Windows 10: Route traffic + DNS through SSH (ie.: socks proxy)

Hi everyone,

I have the following setup:

• 2 computers (A and B)
• Both computers run Windows 10 and I have admin rights
• Computer A is connected to 2 VPN networks (simultaneously)
• Computer A has got OpenSSH server installed and enabled
• Computer B should access the internet and all private domains (coming through the VPNs) via Computer A
• Computer B should resolve host names through Computer A
  in other words: DNS traffic should be resolved through Comp. A as well

Currently, I achieve this by connecting to Comp.B to Comp A. via SSH which gives me a SOCKS proxy in the SSH tunnel. Computer B has got ProxyCap installed which routes all traffic (including DNS) to Comp A. and everything is good.

This setup works pretty well for me, but there's one ugly setback: ProxyCap does change the Winsock configuration of my Windows 10 (on Computer B) which causes incompatibility problems with my other applications. When I execute `netsh winsock show catalog` it does return dozens of new entries related to ProxyCap and I don't want this (if possible)

I would like to avoid using ProxyCap and save myself from an application messing around with such OS level socket settings, but I need all traffic (not just browser traffic) to go through Comp B.

TL;DR: How do I route all Win10 network traffic (including DNS) thorough another Windows 10 computer (preferably over a SOCKS proxy) without using ProxyCap? Is this possible?

submitted by /u/Acquiesce67
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:)

 

Virtual Network Adapter that forwards request to a SOCKS proxy

Here is what I did to do it.

1. Use OpenVPN tap drivers to install a virtual network adapter(use NDIS5 drivers).
   
2. Name it as taplan
   
3. Assign 10.0.0.1 to your network adapter named taplan. Use 255.255.255.0 as subnet mask.
   
4. Have a socks server or use public server you owned to do a ssh tunnel socks proxy connection.
   

If you don't have a socks proxy, you need a public server.
You can use putty to establish an ssh connection along with a tunnel which acts as a socks proxy. Sample command is something like this:

ssh -D 8123 -f -C -q -N socksserverip.com

After that, you have a socks proxy on your localhost at port 8123.

1. Check your socks proxy with Firefox by pointing localhost:8123 as socks proxy. If you have an internet connection then so far so good.
   
2. Download tun2socks from prebuilt windows binaries. For this question, I used badvpn-1.999.128-win32.zip file.
   

Extract bin/badvpn-tun2socks.exe file to somewhere in system PATH and rename it as t2s.

1. Configure tun2socks to make your taplan adapter to use socks proxy.
   

Enter command prompt with admin privileges and type:

Now you have a virtual network adapter named as taplan which uses the socks proxy configured as your localhost to connect to internet. All requests forwarded to this adapter will tunnel through your public server.

1. Configure your internet routes.
   

In command prompt type:

this will show you your current routes. The default gateway is the top one. Note that IP.

Now all your internet traffic will be using 10.0.0.2 as gateway which is configured in a virtual network adapter.

 

windows 10 1809 onedrive ignores proxy settings

I have configured a http proxy and a socks proxy for both internet explorer proxy settings and winhttp proxy settings.

After upgrading to Windows 10 1809 onedrive ignores the configured proxy server.

Edge and windows update utilize the winhttp proxy settings and routes all traffic through the proxy servers properly.

I have verified the proxy settings via netsh:

Code:

netsh winhttp show proxy 

Current WinHTTP proxy settings:

    Proxy Server(s) :  http=192.168.0.10:3128;socks=192.168.0.10:1080

    Bypass List     :  *.local;<local>

 

Configuring socks 5 proxy in window 10

I've to use manual socks 5 proxy but there is no specific option for socks 5 in proxy configuration setting and general socks mode option is not working for socks 5 proxy.In pic. I've shown the network settings of firefox(where socks 5 is present) and of
windows(No specific socks 5 option and general mode is not working).